/* Copyright */
/*******************************************************************************
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Tsunagi-BPM
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *******************************************************************************/
 /* Copyright End */
 
package tsunagi.json.path;

public class StringTokenizer {
	private String value;
	private char delimiter;
	private char cancelCode;
	private int index = 0;
	private int length;
	private static final char EMPTY = ' ';
	
	public StringTokenizer(String val, char delim, char cancel) {
		this.setValue(val);
		this.setDelimiter(delim);
		this.setCancelCode(cancel);
	}
	
	public String next(){
		if (index == this.getLength()) {
			return null;
		}
		StringBuffer result = new StringBuffer();
		StringBuffer sb = new StringBuffer(this.getValue());
		boolean cancelCodeStartFlag = false;
		while(true) {
			char val = sb.charAt(index);
			if (this.getDelimiter() == val) {
				if (cancelCodeStartFlag) {
					result.append(val);
				} else if (index > 0) {
					index++;
					break;
				}
			} else if (this.getCancelCode() == val) {
				cancelCodeStartFlag = cancelCodeStartFlag ? false : true;
				result.append(val);
			} else if (EMPTY == val) {
				if (cancelCodeStartFlag) {
					result.append(val);
				}	
			} else {
				result.append(val);
			}
			index++;
			if (index == this.getLength()) {
				break;
			}
		}
		return result.toString();
	}

	public String getValue() {
		return value;
	}

	public void setValue(String value) {
		this.value = value;
		this.setLength(value.length());
	}

	public char getDelimiter() {
		return delimiter;
	}

	public void setDelimiter(char delimiter) {
		this.delimiter = delimiter;
	}

	public char getCancelCode() {
		return cancelCode;
	}

	public void setCancelCode(char cancelCode) {
		this.cancelCode = cancelCode;
	}

	public int getLength() {
		return length;
	}

	public void setLength(int length) {
		this.length = length;
	}
	
	public static final void main(String[] args) {
		StringTokenizer st = new StringTokenizer("aaa/bbb['xx'='/a/b']/ccc", '/', '\'');
		String val = null;
		while((val = st.next()) != null) {
			System.out.println(val);
		}
	}
}
